Laurence Fox hallucinated he was being robbed by elves

Laurence Fox thought he was being robbed by elves after falling ill while filming 'Bear Grylls: Mission Survive'.

The 'Lewis' actor has confessed he began hallucinating that "little people" were stealing from him after he fell ill with a fever while trekking through the Costa Rican jungle for the ITV survival show.

He shared: "I fell asleep and then I was convinced there were these tiny little people trying to steal things from our rucksacks.

"I was shivering really badly and then I started panicking."

The 36-year-old star - who has been seen clashing with fellow contestant and 'Loose Women' panellist Jamelia on the show hosted by adventurer Bear Grylls - eventually had to be treated by a medic as his condition appeared to be worsening.

According to The Sun newspaper survival expert Scott Heffield, who found Laurence, said: "I went down to the camp and met Laurence half way. He was delirious, hallucinating, shaking, basically talking a load of waffle.

"He's had some stress and anxiety - that's a cocktail for a state of delirium."

Medical staff determined that Laurence was in a hypoglycaemic state, meaning that his blood sugar levels were dangerously low, and his cousin and fellow contestant Emilia Fox had to stay up all night to monitor his condition.

The 'Silent Witness' actress said: "I don't think I have ever been so worried in my entire life.

"It's horrendous watching your family member go through something like that."